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forum threadmlj2015 posted Apr 06, 2026 02:36 PM
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forum threadmlj2015 posted Apr 06, 2026 02:36 PM

MRCOOL Sale at Costco $300-$500 Off $1500

$1,500

$1,800

16% off
Costco Wholesale
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Costco just put their MRCOOL DIY mini-splits on sale, and Costco's prices were already better than elsewhere for these.

12K BTU ($1,500) - https://www.costco.com/mrcool-diy-5th-gen-12k-btu-ductless-mini-split-heat-pump.product.4000356449.h... [costco.com]

18K BTU ($1,900) - https://www.costco.com/mrcool-diy-5th-gen-18k-btu-ductless-mini-split-heat-pump.product.4000356856.h... [costco.com]

24K BTU ($2,300) - https://www.costco.com/mrcool-diy-5th-gen-24k-btu-ductless-mini-split-heat-pump.product.4000357312.h... [costco.com]

https://www.costco.com/s?keyword=mrcool
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Costco just put their MRCOOL DIY mini-splits on sale, and Costco's prices were already better than elsewhere for these.

12K BTU ($1,500) - https://www.costco.com/mrcool-diy-5th-gen-12k-btu-ductless-mini-split-heat-pump.product.4000356449.h... [costco.com]

18K BTU ($1,900) - https://www.costco.com/mrcool-diy-5th-gen-18k-btu-ductless-mini-split-heat-pump.product.4000356856.h... [costco.com]

24K BTU ($2,300) - https://www.costco.com/mrcool-diy-5th-gen-24k-btu-ductless-mini-split-heat-pump.product.4000357312.h... [costco.com]

https://www.costco.com/s?keyword=mrcool

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Apr 06, 2026 04:45 PM
52 Posts
Joined Nov 2015
tristanofallsApr 06, 2026 04:45 PM
52 Posts
There always tradeoffs when going with a DIY-targeted thing like this, but not having to worry so much about vacuum pumps and volatile refrigerant makes this temmmpting. To say nothing of how hard it is to find an independent installer not already tied to one manufacturer.
Apr 06, 2026 04:48 PM
656 Posts
Joined Dec 2007
learnpApr 06, 2026 04:48 PM
656 Posts
Would've been great if Costco had included an option that included installation as well
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Apr 06, 2026 06:50 PM
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Joined Nov 2011
mlj2015
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Apr 06, 2026 06:50 PM
1,317 Posts
Quote from tristanofalls :
There always tradeoffs when going with a DIY-targeted thing like this, but not having to worry so much about vacuum pumps and volatile refrigerant makes this temmmpting. To say nothing of how hard it is to find an independent installer not already tied to one manufacturer.
I was looking at one of these or a Senville Elite Series. The issue with Senville is you have to have a pro come out and pressure test and connect the lines at the end, and lots of them won't work with owner-installed stuff, but I was able to find some in my area that would do that. It's true that a lot of companies won't help, but it seems that there are always some out there who will. The nice thing about MRCOOL is that you keep the warranty with full DIY install. However, those Senville Elite series have some super impressive efficiency ratings, especially the heating.
Last edited by mlj2015 April 6, 2026 at 11:54 AM.
Apr 06, 2026 07:46 PM
52 Posts
Joined Nov 2017
NoobingsApr 06, 2026 07:46 PM
52 Posts
What's the difference between this 12K unit and this one from Ace? Is it just the 1.7 seer rating difference? Is it worth the extra money then? https://www.acehardware.com/depar...c-shopping
Apr 06, 2026 07:58 PM
52 Posts
Joined Nov 2015
tristanofallsApr 06, 2026 07:58 PM
52 Posts
Quote from Noobings :
What's the difference between this 12K unit and this one from Ace? Is it just the 1.7 seer rating difference? Is it worth the extra money then? https://www.acehardware.com/depar...c-shopping
I'm not 100% sure, but the Ace one does not say "DIY" and says "conventional install," so I'd guess it's not the DIY line with the pre-charged lines. If so, you'd need a vacuum pump, pressure test, etc.
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Apr 06, 2026 10:26 PM
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mlj2015
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Apr 06, 2026 10:26 PM
1,317 Posts
Quote from tristanofalls :
I'm not 100% sure, but the Ace one does not say "DIY" and says "conventional install," so I'd guess it's not the DIY line with the pre-charged lines. If so, you'd need a vacuum pump, pressure test, etc.
Only the ones labeled DIY will have the quick connect lines. Otherwise, you'll need a professional to at least flare the ends, pressure test, and set the lines. You should expect to pay somewhere from $400-$800 for that.
Apr 07, 2026 02:03 AM
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Joined Apr 2014
rypajoApr 07, 2026 02:03 AM
1,058 Posts
Have the 12k. It's a beast.

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Apr 07, 2026 02:51 AM
98 Posts
Joined Nov 2010
blobberApr 07, 2026 02:51 AM
98 Posts
Quote from mlj2015 :
Only the ones labeled DIY will have the quick connect lines. Otherwise, you'll need a professional to at least flare the ends, pressure test, and set the lines. You should expect to pay somewhere from $400-$800 for that.
Flaring the lines isn't complicated. Here's a tool at Home Depot for $56. I bought one new, still in the package, for about $20 on eBay.

https://www.homedepot.com/p/Husky.../305562710
Apr 15, 2026 02:59 AM
89 Posts
Joined May 2017
VegasJayApr 15, 2026 02:59 AM
89 Posts
Anyone have a Mr. Cool? Looks like a descent deal!

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